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<DIV dir=ltr align=left><SPAN class=949133718-03032009><FONT face=Arial
color=#0000ff size=2>What are the server specs you are testing
on?</FONT></SPAN></DIV>
<DIV> </DIV>
<DIV align=left>Brad Dameron<BR><FONT color=#808080>Senior Systems
Engineer</FONT><BR><SPAN class=949133718-03032009></SPAN><FONT face=Arial><FONT
color=#0000ff><FONT size=2>C<SPAN
class=949133718-03032009>learw're</SPAN></FONT></FONT></FONT><BR></DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> dhcp-users-bounces@lists.isc.org
[mailto:dhcp-users-bounces@lists.isc.org] <B>On Behalf Of </B>T
MANIKANDAN-PKXR74<BR><B>Sent:</B> Sunday, March 01, 2009 10:12 PM<BR><B>To:</B>
Users of ISC DHCP<BR><B>Subject:</B> RE: Source Tar Ball Installation
<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=921174105-02032009>Hi ,</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=921174105-02032009></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=921174105-02032009> To conclude this mail Chain, we have done
the testing based on the recommendation we received from
experts.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=921174105-02032009></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=921174105-02032009><STRONG>1. To increase the Capacity performance of DHCP
server</STRONG></SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=921174105-02032009> </SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=921174105-02032009> disabling
Ping-check, and writing the leases to ram disk increase the capacity
approximately 25X (25 Times the normal Performance) , By dividing the 10.0/8
into various pools with max of 251 per pool you can achieve the 25 X
capacity performance.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=921174105-02032009></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=921174105-02032009></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=921174105-02032009><STRONG>2. To increase the Performance of service
startup time </STRONG></SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=921174105-02032009></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=921174105-02032009> Increase the Hash table
size for LEASE_HASH_SIZE in /includes/dhcpd.h </SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=921174105-02032009></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=921174105-02032009> Incase any of my understandings is to be
changed or reviewed please mention your comments.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=921174105-02032009></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=921174105-02032009></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=921174105-02032009>Regards</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=921174105-02032009>Mani</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2></FONT><BR></DIV>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> T MANIKANDAN-PKXR74 <BR><B>Sent:</B>
Friday, February 27, 2009 10:05 AM<BR><B>To:</B> 'Users of ISC
DHCP'<BR><B>Subject:</B> RE: Source Tar Ball Installation <BR></FONT><BR></DIV>
<DIV></DIV>
<DIV dir=ltr align=left><SPAN class=703522804-27022009><FONT face=Arial
color=#0000ff size=2>Hi,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=703522804-27022009><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=703522804-27022009><FONT face=Arial
color=#0000ff size=2> The LEASE_HASH_SIZE parameter really improves
the service startup time for my 10.0/8 network from 20 minutes to some seconds
but I didn't see any improvement in the 5 way handshakes performance, this is my
observation.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=703522804-27022009><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=703522804-27022009> <FONT
face=Arial color=#0000ff size=2>and by implementing ping-check off and writing
the leases to a ram disk instead of Hard disk betters the performance for
10.0/24 subnet around 2300 5 way handshakes per second and for 10.0/8 the
performance remains the same around 92 five way handshakes per
second.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=703522804-27022009><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=703522804-27022009><FONT face=Arial
color=#0000ff size=2> Is there a way to increase the performance when
the subnet is 10.0/8 why the performance is degrading ?? any help is
appreciated.</FONT> </SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=703522804-27022009><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=703522804-27022009><FONT face=Arial
color=#0000ff size=2>Thanks & Regards</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=703522804-27022009><FONT face=Arial
color=#0000ff size=2>Mani</FONT></SPAN></DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> dhcp-users-bounces@lists.isc.org
[mailto:dhcp-users-bounces@lists.isc.org] <B>On Behalf Of </B>T
MANIKANDAN-PKXR74<BR><B>Sent:</B> Wednesday, February 25, 2009 6:48
PM<BR><B>To:</B> Users of ISC DHCP<BR><B>Subject:</B> RE: Source Tar Ball
Installation <BR></FONT><BR></DIV>
<DIV></DIV>
<DIV dir=ltr align=left><SPAN class=015451413-25022009><FONT face=Arial
color=#0000ff size=2>Hi,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=015451413-25022009><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=015451413-25022009><FONT face=Arial
color=#0000ff size=2> Iam not getting any success even after editing the
/includes/dhcpd.h and re-compiling, could anyone help me in this iam still
getting only 40 Five way handshakes only. </FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=015451413-25022009></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=015451413-25022009><FONT face=Arial
color=#0000ff size=2>Regards</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=015451413-25022009><FONT face=Arial
color=#0000ff size=2>Mani</FONT> </SPAN></DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> dhcp-users-bounces@lists.isc.org
[mailto:dhcp-users-bounces@lists.isc.org] <B>On Behalf Of </B>T
MANIKANDAN-PKXR74<BR><B>Sent:</B> Tuesday, February 24, 2009 10:30
AM<BR><B>To:</B> Users of ISC DHCP<BR><B>Subject:</B> RE: Source Tar Ball
Installation <BR></FONT><BR></DIV>
<DIV></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff
size=2></FONT> </DIV>
<DIV><SPAN class=480495404-24022009></SPAN><FONT face=Arial><FONT
color=#0000ff><FONT size=2>Hi Brad,</FONT></FONT></FONT></DIV>
<DIV><FONT face=Arial><FONT color=#0000ff><FONT
size=2></FONT></FONT></FONT> </DIV>
<DIV><FONT face=Arial><FONT color=#0000ff><FONT size=2> <SPAN
class=480495404-24022009> for testing I have given the class a subnet, One more
concern is how would I re-compile after editing dhcpd.h ?? I followed the below
mentioned steps</SPAN></FONT></FONT></FONT></DIV>
<DIV><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN
class=480495404-24022009></SPAN></FONT></FONT></FONT> </DIV>
<DIV><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN
class=480495404-24022009>1. uninstall previous dhcpd by rpm -e
dhcpd-3.0.5</SPAN></FONT></FONT></FONT></DIV>
<DIV><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN
class=480495404-24022009>2. download the source tar ball <A
href="http://ftp.isc.org/isc/dhcp/dhcp-3.1.2.tar.gz"><FONT
face="Times New Roman"
size=3>http://ftp.isc.org/isc/dhcp/dhcp-3.1.2.tar.gz</FONT></A><FONT
color=#000000> </FONT></SPAN></FONT></FONT></FONT></DIV>
<DIV><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN
class=480495404-24022009>3. <FONT face=Arial size=2><SPAN
class=363215514-20022009>tar -zxvf
dhcp-3.1.2.tar.gz</SPAN></FONT></SPAN></FONT></FONT></FONT></DIV>
<DIV><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN
class=480495404-24022009><FONT face=Arial size=2><SPAN
class=363215514-20022009>4. edit the dhcpd.h
file</SPAN></FONT></SPAN></FONT></FONT></FONT></DIV>
<DIV><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN
class=480495404-24022009><FONT face=Arial size=2><SPAN
class=363215514-20022009>5.
./configure</SPAN></FONT></SPAN></FONT></FONT></FONT></DIV>
<DIV><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN
class=480495404-24022009><FONT face=Arial size=2><SPAN
class=363215514-20022009>6. make</SPAN></FONT></SPAN></FONT></FONT></FONT></DIV>
<DIV><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN
class=480495404-24022009><FONT face=Arial size=2><SPAN
class=363215514-20022009>7.make
install</SPAN></FONT></SPAN></FONT></FONT></FONT></DIV>
<DIV><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN
class=480495404-24022009><FONT face=Arial size=2><SPAN
class=363215514-20022009>8. create
dhcpd.conf</SPAN></FONT></SPAN></FONT></FONT></FONT></DIV>
<DIV><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN
class=480495404-24022009><FONT face=Arial size=2><SPAN
class=363215514-20022009>9. /usr/local/sbin/dhcpd (to start the dhcpd
service)</SPAN></FONT></SPAN></FONT></FONT></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2></FONT> </DIV>
<DIV><SPAN class=480495404-24022009><FONT face=Arial color=#0000ff
size=2>Regards</FONT></SPAN></DIV>
<DIV><SPAN class=480495404-24022009><FONT face=Arial color=#0000ff
size=2>Mani</FONT></SPAN></DIV>
<DIV><FONT face=Arial color=#0000ff size=2></FONT><BR></DIV>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> dhcp-users-bounces@lists.isc.org
[mailto:dhcp-users-bounces@lists.isc.org] <B>On Behalf Of </B>Brad
Dameron<BR><B>Sent:</B> Monday, February 23, 2009 10:55 PM<BR><B>To:</B> Users
of ISC DHCP<BR><B>Subject:</B> RE: Source Tar Ball Installation
<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV dir=ltr align=left><SPAN class=746312317-23022009><FONT face=Arial
color=#0000ff size=2>How many leases do you have in your dhcpd.conf? This
setting seemed to only really be noticable with 10k or more leases. You should
be fine with 3.1.2. </FONT></SPAN></DIV>
<DIV><FONT face=Arial color=#0000ff size=2></FONT> </DIV>
<DIV align=left>Brad Dameron<BR><FONT color=#808080>Senior Systems
Engineer</FONT></DIV>
<DIV align=left><SPAN class=746312317-23022009><FONT
color=#808080>Clearw're</FONT></SPAN></DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> dhcp-users-bounces@lists.isc.org
[mailto:dhcp-users-bounces@lists.isc.org] <B>On Behalf Of </B>T
MANIKANDAN-PKXR74<BR><B>Sent:</B> Friday, February 20, 2009 7:18
AM<BR><B>To:</B> Users of ISC DHCP<BR><B>Subject:</B> Source Tar Ball
Installation <BR></FONT><BR></DIV>
<DIV></DIV>
<DIV>
<DIV><FONT face=Arial size=2><SPAN
class=363215514-20022009>Hi,</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=363215514-20022009></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=363215514-20022009> Based on the
comments received from Brad earlier on tuning DHCP for max performance, I
decided to upgrade My DHCP server to 3.1.2 from 3.0.5 and also include the HASH
adjustment for getting max performance.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=363215514-20022009></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=363215514-20022009> My
initial version 3.0.5 is from Linux OS didn't have any dhcpd.h file,
</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=363215514-20022009>I downloaded the
source tar ball from <A
href="http://ftp.isc.org/isc/dhcp/dhcp-3.1.2.tar.gz"><FONT
face="Times New Roman"
size=3>http://ftp.isc.org/isc/dhcp/dhcp-3.1.2.tar.gz</FONT></A> to /tmp/
directory and ran the following commands to build the new
release</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=363215514-20022009></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=363215514-20022009>tar -zxvf
dhcp-3.1.2.tar.gz</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=363215514-20022009></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=363215514-20022009>1.
./configure</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=363215514-20022009>2.
make</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=363215514-20022009>3.make
install</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=363215514-20022009></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=363215514-20022009>and also I made the
following changes in syslog.conf </SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=363215514-20022009>local6.*
-/var/log/dhcpd.log</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=363215514-20022009>and changed the
LEASE_HASH_ from 100003 to 250007, </SPAN></FONT><FONT face=Arial size=2><SPAN
class=363215514-20022009>the file I edited is in the location
</SPAN></FONT><FONT face=Arial size=2><SPAN
class=363215514-20022009><STRONG>/tmp/dhcp-3.1.2/includes/</STRONG><BR></DIV></SPAN></FONT>
<DIV><FONT face=Arial size=2><SPAN class=363215514-20022009>initially the
performance was around 40 Five way hand shakes per second from 3.0.5 and after
installing 3.1.2 it increased to 61 five way handshakes per second , and
some how I feel the changes made in hash adjustment is not effective, how do I
verify this change. or I need to do some additional steps in order to make the
hash adjustment effective</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=363215514-20022009></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=363215514-20022009>did I make any
mistake in installing 3.1.2 </SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=363215514-20022009>should I edit any
other file prior to configure or make or make install.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=363215514-20022009>how the changes in
hash will be effective.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=363215514-20022009></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=363215514-20022009>also in ver 3.0.5
from Linux OS I didn't find /includes/dhcpd.h at all is it normal
??</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=363215514-20022009></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=363215514-20022009>Request to guide me
in this regard.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=363215514-20022009></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=363215514-20022009>Regards</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=363215514-20022009>Mani</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=363215514-20022009></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=363215514-20022009></SPAN></FONT> </DIV></DIV></BODY></HTML>